High quality 1″ (25mm) fine thread, zinc plated pocket hole screws featuring a gash point for easy installation. The Fine thread screw suits hardwood such as oak, maple, walnut and cherry. These screws are supplied pan head with a Robertson No2 square drive recess ensuring maximum engagement between the driver bit and screw which results in effortless insertion. Supplied in a box of 250 pieces. Recommended Screw Length; Material Thickness Screw Length 1/2″ (13mm) 1″ (25mm) 3/4″ (19mm) 1-1/4″ (32mm) 12 (25mm) 1-1/2″ (38mm) 1-1/4″ (32mm) 2″ (51mm) 1-1/2″ (38mm) 2-1/2″ (64mm) Woodfox pocket hole screws can be used with other brands of jigs, such as Kreg, which use the same square drive.